CN102857107B - DC to DC power converters and the method for controlling the power converter - Google Patents

DC to DC power converters and the method for controlling the power converter Download PDF

Info

Publication number
CN102857107B
CN102857107B CN201210142028.XA CN201210142028A CN102857107B CN 102857107 B CN102857107 B CN 102857107B CN 201210142028 A CN201210142028 A CN 201210142028A CN 102857107 B CN102857107 B CN 102857107B
Authority
CN
China
Prior art keywords
dc
power
pv
converters
generator unit
Prior art date
Application number
CN201210142028.XA
Other languages
Chinese (zh)
Other versions
CN102857107A (en
Inventor
R·L·施泰格瓦尔德
A·埃拉泽
J·A·萨巴特
M·H·托多罗维奇
M·阿加米
Original Assignee
通用电气公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to US13/171,683 priority Critical patent/US8330299B2/en
Priority to US13/171683 priority
Application filed by 通用电气公司 filed Critical 通用电气公司
Publication of CN102857107A publication Critical patent/CN102857107A/en
Application granted granted Critical
Publication of CN102857107B publication Critical patent/CN102857107B/en

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00Conversion of dc power input into dc power output
    • H02M3/22Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/337Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration
    • H02M3/3372Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration of the parallel type
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00Conversion of dc power input into dc power output
    • H02M3/02Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20The dispersed energy generation being of renewable origin
    • H02J2300/22The renewable source being solar energy
    • H02J2300/24The renewable source being solar energy of photovoltaic origin
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381Dispersed generators
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381Dispersed generators
    • H02J3/382Dispersed generators the generators exploiting renewable energy
    • H02J3/383Solar energy, e.g. photovoltaic energy
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00Details of apparatus for conversion
    • H02M2001/0083Converters characterized by their input or output configuration
    • H02M2001/0093Converters characterized by their input or output configuration wherein the output is created by adding a regulated voltage to or subtracting it from an unregulated input
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/56Power conversion electric or electronic aspects
    • Y02E10/563Power conversion electric or electronic aspects for grid-connected applications
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T307/00Electrical transmission or interconnection systems
    • Y10T307/74Switching systems
    • Y10T307/937Switch actuation
    • Y10T307/944Power circuit controlled

Abstract

The present invention is entitled " DC to DC power converters and the method for controlling the power converter ".Description one kind is configured to be provided to DC links (84) electricity generation system (10) of direct current (DC) power.The system includes the first generator unit (22) for being configured to export DC power.The system also includes DC to a DC converters (70), and DC to a DC converters include input section (90) and deferent segment (92).The deferent segment of the first DC to DC converters and the first generator unit series coupled.First DC to DC converters are configured to the Part I of the DC power outputs for processing the first generator unit and provide to deferent segment the untreated Part II of the DC power outputs of the first generator unit.

Description

DC to DC power converters and the method for controlling the power converter

The statement of the research and development that relevant the United States Federal subsidizes

The present invention is to support that the contract GE-EE0000572 subsidized according to Ministry of Energy (DOE) is completed using U.S. government. U.S. government possesses some rights in the present invention.

Technical field

Invention described herein embodiment relates generally to photovoltaic (PV) electricity generation system, and more precisely, is related to use In the method and system that power is extracted from photovoltaic collection system.

Background technology

Solar energy turns into attractive energy source increasingly, and has been considered as cleaning the energy of renewable alternative form Amount.Photovoltaic (PV) battery generates direct current (DC) power, and its DC electric current level depends on solar radiation, and its DC voltage level depends on In temperature.When exchange (AC) power is needed, DC power is converted into AC power using inverter.Generally, PV inverters are used Two-stage realizes Power Processing, wherein the first order be disposed for providing constant D/C voltage and the second level be disposed for by Constant D/C voltage is converted into AC electric currents and the voltage compatible with power network.Generally, PV inverters use DC links to be stored up as centre Energy step, it means that PV inverters include DC to the DC conversions of the D/C voltage that unstable PV array voltages are converted into stabilization Device and the subsequent D/C voltage by stabilization are converted into DC to the AC inverters of the AC electric currents that can be injected on power network.Two-stage type inversion The efficiency of device is the important parameter of the performance for influenceing PV systems, and is the multiple of individual stage efficiency.

In order to obtain more high current and voltage, PC batteries are electrically connected to form PV modules.In addition to multiple PV batteries, PV Module can also include sensor, such as irradiance sensor, temperature sensor and/or power meter.PV modules can also be connected Connect to form a string, and multiple series winding can be connect to form PV arrays.Generally, the D/C voltage for PV arrays being exported is provided To grid inverters, such as DC to AC voltage inverters.D/C voltage is converted into single-phase or three intersected by DC to AC voltage inverters Stream (AC) voltage and current.Three-phase AC outputs can be provided to middle pressure power transformer, power transformer lifting electricity is pressed in this Pressure press AC in the three-phase being injected into power distribution network to produce.

Most of PV electricity generation systems change the overall power output of PV arrays using central DC to DC converters, and this causes Higher cost and greater weight solution.Further, center DC to DC converters are usually using MPPT maximum power point tracking device (MPPT), it includes the sensor for measuring array voltage and electric current to be used in computing array power.For operation DC Sensor to needed for DC converters, sensors with auxiliary electrode is additional.And, including total power change DC to DC converters PV The shortcoming of electricity generation system is referred to as compound (efficiency compounding) effect of efficiency.The efficiency of PV electricity generation systems may not Than the efficiency high of central DC to DC converters.The gross efficiency of DC to AC conversions is because of DC to DC converter efficiencies and DC to AC inverters Efficiency compound and reduce by 1% to 2%.Furthermore, the failure in central DC to the DC converters of full rated power may cause whole The failure of individual PV arrays.In order to prevent such PV arrays from failing, come usually using additional array series diode and fuse Isolation DC to DC converter failures.

The content of the invention

In an aspect, there is provided one kind is configured to be provided to DC links the electricity generation system of direct current (DC) power.The system The first generator unit including being configured to export DC power.The system also includes DC to a DC converters, and a DC to DC turns Parallel operation includes input section and deferent segment.The deferent segment of the first DC to DC converters and the first generator unit series coupled.First DC It is configured to process the Part I of the DC power outputs of the first generator unit to DC converters, and by first generator unit The untreated Part II of DC power outputs is provided to the deferent segment.

In another aspect, there is provided a kind of DC to DC Partial Powers converter.The DC-DC Partial Power converters include Input section, the input section is configured to the Part I of the DC power outputs for receiving generator unit.DC to DC Partial Power converters Also include deferent segment, the deferent segment is configured to export the part and second of the first treatment of the DC power outputs comprising generator unit The DC power of untreated part, to be applied to DC links.

In a further aspect, there is provided a kind of method for controlling the operation of electricity generation system.The electricity generation system is included extremely Few a generator unit and at least one portion power converter, wherein at least one portion power converter include control Device, the controller is configured to control the operation of at least one semiconductor switch.The method include configuration section power converter with It is determined that the level of the electric current of at least one semiconductor switch is flowed through, and configuration section power converter is flowed through at least with maximizing One level of the electric current of semiconductor switch, so as to maximize the power output of at least one generator unit.

Brief description of the drawings

Fig. 1 is the block diagram of demonstration photovoltaic (PV) electricity generation system.

Fig. 2 is the circuit diagram of demonstration DC to the DC converters that may include in PV electricity generation systems shown in Fig. 1.

Fig. 3 is the curve map of the gross efficiency of the power conversion that DC to the DC converters shown in Fig. 2 are performed, and the gross efficiency is DC To the function of the gain of DC converters.

Fig. 4 is the curve map of the fractional rating that the direct current (DC) shown in Fig. 2 is conveyed to DC converters, and the fractional rating is DC To the function of the gain of DC converters.

Fig. 5 is the curve map of the gross efficiency of DC to the DC converters shown in Fig. 2, and the gross efficiency is the conversion of DC to DC converters Power percentage function.

Demonstration Current Voltage (IV) feature of PV electricity generation systems shown in Fig. 6 pictorial images 1.

Fig. 7 is the circuit of the first alternative of DC to the DC converters that be may include in PV electricity generation systems shown in Fig. 1 Figure.

Fig. 8 is the circuit of the second alternative of DC to the DC converters that be may include in PV electricity generation systems shown in Fig. 1 Figure.

Fig. 9 is the circuit of the 3rd alternative of DC to the DC converters that be may include in PV electricity generation systems shown in Fig. 1 Figure.

Figure 10 is the circuit of the 4th alternative of DC to the DC converters that be may include in PV electricity generation systems shown in Fig. 1 Figure.

Figure 11 is the circuit of the 5th alternative of DC to the DC converters that be may include in PV electricity generation systems shown in Fig. 1 Figure.

Figure 12 is the flow chart of the demonstration methodses for the PV electricity generation systems shown in operation diagram 1.

Specific embodiment

Method described herein, system and equipment contribute at least one photovoltaic (PV) for controlling to include in PV electricity generation systems The power output of module, and the power output of at least one PV modules is converted into from direct current (DC) power to exchange (AC) power To be applied to power network.Control DC to DC converters extract peak power with from least one PV modules of feeding power.By The percentage of the general power of DC to DC converters treatment PV module outputs.Transducer loss is minimized, because PV modules are defeated Only certain fraction for the general power for going out is processed by DC to DC converters.Although being described with respect to PV electricity generation systems herein, It is that method described herein, system and equipment can universally be applied to any power generation applications.

Method described herein, system and equipment include DC to DC power converters, and DC to DC power converters are controlled Only to process certain fraction of the general power of PV modules, string or array conveying, and by so doing, DC to DC power converters Control is transported to the general power of DC to the AC converters of high power power network connection.Because being transported to the general power of DC to AC inverters Only certain fraction be processed, so loss is minimized, result in the efficiency of the lifting of PV electricity generation systems.Lifting conversion effect Rate improves integral energy yield.And, because DC to AC inverters adjustment main system DC link voltages, it is possible to using letter Single algorithm maximizes individuality PV modules, PV strings and/or PV arrays will pass through the electric current that simple maximization is transported to DC links The power of output.The quantity of small DC to the DC power converters needed for being at least partly because the system of highly distributed is higher, So this simplified permission PV electricity generation systems improve reliability and reduces cost.PV is spread over by by DC to DC power converters Electricity generation system, though exist module mismatch, shade or if dirty dye and/or such as floating clouds are by (passing cloud) In the case of other unbalance influences of momentary events, the power from whole PV arrays is still maximized.By suitably controlling DC To DC converters, maximum array voltage can be safely limited, and series diode isolation and fault tolerance can be realized.And And, the configuration allows to carry out arc fault detection to PV modules.Because these power converters are rated for more total than what system was conveyed The significantly small power of power, so reducing the cost of DC to the DC converters, size and weight.

The technique effect of method described herein, system and equipment includes at least one following:(a) configuration section The level of electric current of the power converter to determine to flow through at least one semiconductor switch included in Partial Power converter;And B () configures the Partial Power converter to maximize the level of the electric current for flowing through at least one semiconductor switch, so that maximum Change the power output of at least one generator unit.

Fig. 1 is the block diagram of the example embodiment of electricity generation system 10.In the example embodiment, electricity generation system 10 includes multiple Generator unit 12.In the example embodiment, electricity generation system 10 is the multiple PV units 12 for including coupling to form PV arrays PV electricity generation systems.In other words, each the PV unit in multiple PV units 12 and at least one other PV in multiple PV units 12 Unit is electrically connected to form PV electricity generation systems.PV units 12 can include but is not limited to PV modules, PV strings and/or one group of PV string. PV electricity generation systems 10 also include at least one DC to AC inverters 14.In the example embodiment, PV units 12 for example will be counted only Megawatt or hundreds of kilowatts be transported to DC to AC inverters 14.DC to AC inverters 14 adjust from PV units 12 receive DC power simultaneously The power of power grid quality is transported to AC power network 16.PV units 12 are connect with series connection and/or series winding in parallel, then by some grades of groups It is combined for its power to be transported to the input 18 of DC to AC inverters 14.

In the example embodiment, PV units 12 include a PV units 22, the 2nd PV units 24, the 3rd PV units 26, 4th PV units 28, the 5th PV units 30 and the 6th PV units 32.First, second, and third PV units 22,24 and 26 are coupling in Such as first string combiner 40 sentences the string 42 to form the first array.Four, the 5th and the 6th PV units 28,30 and 32 are coupling in Such as second string combiner 46 sentences the string 48 to form the second array.Furthermore, the string 48 of the array of string 42 and second of the first array Coupled for example, by array combiner 50.Array combiner 50 is by DC power outputs to DC to AC inverters 14.Although being described as Including six PV units, three strings of array, two string combiners and an array combiners, but PV electricity generation systems 10 can be wrapped Containing allow PV electricity generation systems 10 by any amount of PV units for realizing function described herein, the array of string, string combiner and/ Or array combiner.

In the example embodiment, PV electricity generation systems 10 include at least one DC to DC converters 68, for example, a DC is extremely DC converters 70, the 2nd DC to DC converters 72, the 3rd DC to DC converters 74, the 4th DC to DC converters 76, the 5th DC are extremely DC to the DC converters 80 of DC converters 78 and the 6th.In the example embodiment, DC to a DC converters 70 are coupling in first Between PV units 22 and string combiner 40, the 2nd DC to DC converters 72 be coupling in the 2nd PV units 24 and string combiner 40 it Between, the 3rd DC to DC converters 74 are coupling between the 3rd PV units 26 and string combiner 40, the coupling of the 4th DC to DC converters 76 Close between the 4th PV units 28 and the second string combiner 46, the 5th DC to DC converters 78 are coupling in the 5th PV units 30 and the Between two string combiners 46, and the 6th DC to DC converters 80 be coupling in the 6th PV units 32 with second go here and there combiner 46 it Between.

In the first alternative, DC to a DC converters 70 are coupling in the first string combiner 40 and array combiner Between 50, and the 2nd DC to DC converters 72 are coupling between the second string combiner 46 and array combiner 50.It is standby second Select in embodiment, DC to a DC converters 70 are coupling between array combiner 50 and DC to AC inverters 14.Furthermore, can be with At least one DC to DC converters 68 are located in PV electricity generation systems 10 allows PV electricity generation systems 10 to realize work(by described herein At any position of energy.For example, the rated power of DC to a DC converters 70 will be depending on it in PV electricity generation systems 10 Position and change.

At least one DC to DC converters 68 are controlled to extract peak power with from multiple PV units 12.In the example embodiment In, the first DC to DC converters 70 of control extract peak power with from a PV units 22, control the 2nd DC to DC converters 72 Peak power is extracted with from the 2nd PV units 24, the 3rd DC to DC converters 74 of control extract maximum work with from the 3rd PV units 26 Rate, the 4th DC to DC converters 76 of control extract peak power with from the 4th PV units 28, control the 5th DC to DC converters 78 Peak power is extracted with from the 5th PV units 30, and the 6th DC to DC converters 80 of control are extracted most with from the 6th PV units 32 It is high-power.In the first alternative, the first DC to DC converters 70 of control are extracted with from the combination of PV units 22,24 and 26 Peak power, and the 2nd DC to DC converters 72 of control extract peak power with from the combination of PV units 28,30 and 32. In two alternatives, the first DC to DC converters 70 of control are extracted most with from the combination of PV units 22,24,26,28,30 and 32 It is high-power,

DC to DC converters 68 are set to can be mono- from PV closer to the increase of individuality PV units 22,24,26,28,30 and 32 The power that unit 22,24,26,28,30 and 32 extracts.This is at least partly because following facts:The one of the field regions of PV units Shade, dirty dye or module mismatch in part will not affect that other PV units being located in the other parts of the field regions are defeated The power for sending.But, only in the case of DC to DC converters 68 are efficient, DC to DC converters 68 are set to closer Body PV units 22,24,26,28,30 and 32 increase can from PV units 22,24,26,28,30 and 32 extract power, this be because Be compared with efficient DC to a DC converter is used, using DC to the DC converters of the deficient efficiency of multiple will not increase from The power that PV units 22,24,26,28,30 and 32 are extracted.And, only the cost in converter it is sufficiently low so that financial increment not In the case of being offset with increased energy yield, DC to DC converters 68 are set to be only reality closer to individuality PV units 's.

Fig. 2 is (shown in Fig. 1) electricity of the example embodiment of DC to the DC converters 70 that be may include in PV electricity generation systems 10 Road Figure 82.In the example embodiment, DC to DC converters 70 are coupling in PV units (a such as PV units 22) and DC links Between 84.DC loads 86 can be set to across DC links 84.DC load 86 can include but is not limited to, battery charger and/ Or grid-connected (grid tied) inverter, for example, DC to AC voltage inverters 14 (as shown in Figure 1).DC links 84 can be coupled To DC to AC inverters 14, first go here and there combiner 46 (as shown in Figure 1) and/or array combiner 50 (as shown in Figure 1) or comprising Wherein.DC to DC converters 70 referred to herein as Partial Power converter (PPC) because the power output of PV units 22 Only a part is changed by DC to DC converters 70.The remainder of the power output of PV units 22 is provided to DC to DC converters 70, but before providing to DC links 84, do not changed and/or processed by DC to DC converters 70.

In the example embodiment, DC to DC converters 70 are configured to include the push-pull type conversion of at least one transformer 88 Device.Can be using any other suitable DC to DC converter arrangement although being illustrated as push-pull type converter.At least one Transformer 88 includes first level segment 90 (also referred herein as input section), and secondary section 92 (also referred herein as deferent segment). In the example embodiment, just level segment 90 includes at least one armature winding, such as the first armature winding 96 and the second armature winding 98.First level segment 90 also includes at least one semiconductor devices, such as the first semiconductor devices 102 and the second semiconductor devices 104. Semiconductor devices 102 and 104 can include (but being not limited to include) insulated gate bipolar transistor (IGBT), metal oxide half It is bipolar that conductor field-effect transistor (MOSFET) or utilization silicon or wide bandgap material (for example, carborundum and/gallium nitride) are realized Junction transistor (BJT).In the example embodiment, just level segment 90 also includes the operation of control semiconductor devices 102 and 104 Controller 106.For example, controller 106 can provide control signal, the wherein dutycycle of control signal to semiconductor devices 102 The voltage output of control DC to DC converters 70.Adjusted by DC to AC inverters 14 wherein DC links 84 voltage it is alternative In embodiment, DC to DC converters 70 adjust the input of the PV units (for example, PV units 22) of association by Duty ratio control Voltage extracts peak power with from PV units 22.

In the example embodiment, secondary section 92 includes at least one secondary windings, such as the first secondary windings 108 and the Secondary stage winding 110.Secondary section 92 also includes at least one semiconductor devices, such as the first diode 114 and the second diode 116.In the example embodiment, the output 120 of PV units 22 be coupled to the first armature winding 96 and the second armature winding 98 it Between the secondary windings 108 of centre cap 130 and first and second subprime winding 110 between centre cap 140.By PV units 22 DC electric current (the I of outputPV) 144 Part I (Iprimary) 142 provide to first level segment 90.The DC electric current of PV units 22 is exported 144 Part II (herein also referred to as load current (Iload) or DC link currents (IDClink) 146) it is directly provided to secondary section 92.First level segment 90 and secondary section 92 are also by Mutual Inductance Coupling.More precisely, the Mutual Inductance Coupling of armature winding 96 and 98 is to secondary windings 108 and 110.In operation, the current-induced for changing over time of armature winding 96 and 98 across the He of secondary windings 108 is flowed through 110 voltage.

In the example embodiment, just level segment 90 extracts a part for the DC electric current of the generation of PV units 22.Furthermore, secondary section 92 with the series coupled of PV units 22 so that (the V of output voltage 150 of DC to DC converters 70s) with the output voltage of PV units 22 152(Vmppt) series connection.In other words, it is transported to voltage (the herein referred as V of DC links 84DClink154) it is (the V of PV voltages 152mppt) with (the V of DC to DC transducer voltages 150s) sum.And, the power for being transported to DC links 84 is processed more than DC to DC converters 70 And/or the power of conversion.Therefore, the rated power of DC to DC converters 70 can be active less than the institute that will be delivered to DC links 84 The situation that rate is processed and/or changed by DC to DC converters 70.Even if the rated power of DC to DC converters 70 is less than and is transported to The power of DC links 84, DC to DC converters 70 still are able to control Iload146, also referred to as DC link currents.Implement in the demonstration In example, DC link voltages 154 are controlled by DC to the AC inverters 14 for being coupled to power network 16 (as shown in Figure 1).

Fig. 3 is that PPC is (for example, DC to DC converters in the case of it is assumed that DC to DC converters 70 have 95% efficiency 70 (as shown in Figure 2)) perform power conversion gross efficiency 182 simulation curve figure, the gross efficiency is DC to DC converters 70 Gain 184 function.The gain 184 of DC to DC converters 70 is defined as the output voltage of DC to DC converters 70 herein (for example, output voltage (Vs) 150 (as shown in Figure 2)) and divided by DC to DC converters 70 provide voltage (for example, input voltage (Vmppt) 152 (as shown in Figure 2)).In the example embodiment, DC to DC converters 70 are by the gain operation less than about 0.5.Such as Shown in figure, under the gain less than about 0.5, the gross efficiency 182 of DC to DC converters 70 is more than 98%.With DC to DC converters (that is, gain 184 declines) is reduced in the part of the power of conversion, and the gross efficiency 182 of DC to DC converters 70 increases.

Fig. 4 is the simulation curve figure of the fractional rating 192 of PPC (for example, (shown in Fig. 2) DC to DC converters 70) conveyings 190, the fractional rating is the function of gain 184.Fractional rating 192 is defined herein as the DC of the conveying of DC to DC converters 70 The part changed by DC to DC converters 70 in power.For in 184 times DC to the DC converters of operation of gain less than about 0.5 70, fractional rating 192 be DC to DC converters 70 be transported to such as DC load 86 (as shown in Figure 2) general power about three/ One.Therefore, in the example embodiment, the rated power of DC to DC converters 70 need to be only the general power for being transported to DC loads 86 About 1/3rd.As illustrated, the actual power of the conversion of DC to DC converters 70 is sufficiently smaller than the conveying of DC loads 86 General power.By conversion less than the general power that DC loads 86 is transported to, can be used in PV electricity generation systems 10 (as shown in Figure 1) Have a case that relatively low rated power (that is, peak power DC to DC converters 70 be rated for can without damage or excessive wear Under changed) DC to DC converters.Relatively low specified converter it is generally smaller than the converter of higher nominal, lighter and Cost is lower.

Fig. 5 is simulation curve Figure 200 of the gross efficiency 182 (shown in Fig. 3) of PPC (for example, DC to DC converters 70), should Gross efficiency 182 is the function of per unit voltage 210.Per unit voltage 210 is defined herein as PV voltages (Vmppt) 152 (such as Shown in Fig. 2) to DC link voltages (VDClink) 154 (as shown in Figure 2) ratio.As PV voltages 152 approach DC link voltages 154 (that is, Vmppt/VDClinkApproach 1), the amount of the power of the treatment of DC to DC converters 70 declines, and total PPC efficiency 182 is approached 100%.Certain fraction of the DC power of the output (as shown in Figure 1) of PV units 22 is only changed by using DC to DC converters 70, Converter can be greatly reduced specified, and therefore reduce converter cost, size and weight.Furthermore, will can finally change Improved efficiency exceedes the efficiency of full power converter.Facilitate more cost-efficient using the arrangement of this type in big PV systems Energy yield is balanced.Furthermore, on expected ambient temperature range, such as but not limited to -40 ° degrees Celsius (C) is to 65 DEG C, it is contemplated that (that is, the V of per unit voltage 210mppt/VDClink) change between about 0.6 to 1.0.Can be pre- in the change of larger PC voltages 152 Meter efficiency is more than 98%.

Demonstration Current Voltage (IV) characteristic of Fig. 6 diagrams PV electricity generation systems 10 (as shown in Figure 1).More precisely, Fig. 6 bags Include primary current (Iprimary) 142 (as shown in Figure 2) be per unit voltage 210 function the first curve map 220, PV electric currents (IPV) 144 (as shown in Figure 2) be per unit voltage 210 function the second curve 222, and DC load currents (Iload)146 (as shown in Figure 2) is the 3rd curve 224 of the function of per unit voltage 210.Because DC to AC inverters are (for example, DC to AC is inverse Become device 14 (as shown in Figure 1)) control DC link voltages 154, so ought by PV arrays be transported to DC links 84 (as shown in Figure 2) and The I controlled by DC to DC converters 70DClink146 reach maximum, such as VmpptWhen 256, occur from given PV modules or The peak power of string.Therefore, the maximum power control algorithm simply and readily realized is performed, wherein in making PV electricity generation systems 10 The DC link currents 146 of each DC to DC converter conveying are maximized.Therefore, the control of each DC to DC converter is simplified (for example, maximizing DC link currents 146 to maximize power output).Current sensor is only needed, its quantity is than other circuit cloth Number of sensors needed for the maximum power control put is low.

Fig. 7 is the circuit diagram 280 of the first alternative 282 of DC to DC converters 70 (shown in Fig. 1).It is alternative first In embodiment, DC to DC converters 282 are configured including flyback converter.DC to DC converters 282 include single transistor 284, Transformer 286, the first capacitor 288, the second capacitor 290 and commutation diode 291.The operation of flyback converter substantially with push away The operation of pull converter (as shown in Figure 2) is similar.The multiple transistors 102 and 104 included in DC to DC converters 70 than Flyback converter can be used in more power application.But, than push-pull type converter, include in flyback converter compared with The transistor of low quantity provides the solution of lower cost, is suitable to lower-wattage application.For example, can be by multiple PV units 12 The power output of PV units 22,24,26,28,30 and 32 (all as shown in Figure 1) be applied to DC to DC converters 282.Again Person, in this alternative embodiment, transformer 286 has lower than the rated power capacity of transformer 88 (as shown in Figure 2) specified Power capacity.The specified converter for also contributing to lower cost of the lower-wattage of transformer 286.In alternative embodiments, PV units 22 the first side 292 or the second side 294 can be grounded, and alternately, the first side 292 and/or the second side 294 can be with earth-free (that is, floating).

Fig. 8 is the circuit diagram 300 of the second alternative 310 of DC to DC converters 70 (shown in Fig. 1).It is alternative second In embodiment, DC to DC converters 310 are configured including forward converter.With first alternative 282 (as shown in Figure 7) phase Seemingly, DC to DC converters 310 include single transistor 312, but DC to DC converters 310 are configured to be applied in mid power level In use, it is at least partly due to the addition of secondary inductor 314.Primary current (I in transistor 312pk) 320 with DC bear Carry electric current 146 proportional.As described above, the power for being transported to DC links 84 is proportional to DC link currents 146.Therefore, be most The PV power outputs of bigization PV units 22, primary current 320 in sensing transistor 312 simultaneously maximizes it.It is maximum using this The method for changing power points tracking, is the PV power outputs of maximizing PV units 22 without PV module output current sensors.With This mode, generally senses to control the electric current 320 used during DC to DC converters 310 to be also used for maximal power tracing, without Additional current sensor measures array current 144 or DC link currents 146.

In the example embodiment, transistor 312 is configured to protect DC to DC converters 70 from high voltage.More properly Say, make transistor 312 " conducting (ON) " prevent DC link voltages 154 from exceeding predefined overvoltage level.Such situation may be sent out Life is during such as startup of DC to DC converters 70, and it is higher than expected model that environment temperature is less than expected scope and brightness When enclosing.Can store by such as controller 322 and/or access maximum PV voltage levels.If PV voltages 152 exceed maximum PV electricity Voltage level, then controller 322 transistor 312 is maintained at " conducting " state, this produces short circuit across PV units 22.PV units 22 Maximum current output be limited to following level, it is less than and is not damaging the component in DC to DC converters 70 (such as but not limited to Transistor 312) in the case of can be applied to the maximum current of DC to DC converters 70.

Fig. 9 is the circuit diagram 360 of the 3rd alternative 362 of DC to DC converters 70 (shown in Fig. 1).Substituted the 3rd In embodiment, DC to DC converters 362 are configured including full-bridge converters.DC to DC converters 362 include the first transistor 364, Transistor seconds 366, the transistor 370 of third transistor 368 and the 4th, this allows DC to DC converters 362 in higher-wattage electricity Used in flat application, combiner of for example going here and there (for example goes here and there combiner 40, string combiner 46 and/or array combiner 50 (all such as figure Shown in 1)) output power level.Described as combining DC to DC converters 310, by maximizing primary current 320 come real The peak power now extracted from PV units 22.DC to DC converters 362 are included for measuring via the primary of the 4th transistor 370 The current sensing device 372 of electric current 320.Can by hard switching pulsewidth modulation (PWM) signal, Sofe Switch phase-shifting PWM signal and/ Or any other suitable signal controls DC to DC converters 362.Furthermore, transistor 364,366,368 and 370 is maintained at " conducting " state is prevented when PV voltages 152 exceed predefined level, and DC link voltages 154 exceed predefined overvoltage electricity Flat, this may occur during for example starting and/or under extreme cold and bright state.

Figure 10 is the circuit diagram 374 of the 4th alternative 376 of DC to DC converters 70 (shown in Fig. 1).It is standby the 4th Select in embodiment, DC to DC converters 376 include feed stream transformer configuration.DC to DC converters 376 include the first transistor 378th, transistor seconds 380, the transistor 384 of third transistor 382 and the 4th.By DC electric current (Id) 386 it is fed into full-bridge rectification Device 388.Full-bridge rectifier 388 includes the first diode 390, the second diode 392, the 3rd diode 394 and the 4th diode 396.DC to DC converters 376 allow DC link voltages (VDClink) 154 be used for pass through the Clamping voltages of clamp diode 390 and 392 Spike.Therefore, the switch of transistor 378,380,382 and 384 is clamped down on lossless way by the way that energy is returned into DC links 84 When Lock-in due to voltage spikes.

Figure 11 is the circuit diagram 400 of the 5th alternative 402 of DC to DC converters 70 (shown in Fig. 1).It is standby the 5th Select in embodiment, DC to DC converters 402 include that Partial Power processes buck (buck-boost) configuration.DC to DC converters 402 input section 90 includes switch (such as transistor 403), inductor 404 and input capacitor 405.DC to DC converters 402 Deferent segment 92 includes output capacitor 406, and can include diode 408.DC to DC converters 402 include transformer or Output rectifier.More rightly, the direct-coupling of input section 90 (that is, Mutual Inductance Coupling) arrives deferent segment 92.Therefore, DC to DC converters 402 are suitable to be used in medium power applications or high power applications.

Output voltage (that is, the V of DC to DC converters 402DClink154) equal to input voltage (that is, PV array voltages 152, Vmppt) with across output capacitor 406 voltage (that is, Vs150) sum.VDClink154 dutycycles for depending on transistor 403 (d).More precisely, Vmppt152 and Vs150 are associated as follows:

(formula 1)

This non-inversion type of voltage step-up/down converter relation allows the V in wide scopempptDC to DC converters are used in 152 changes 402 (for example, Vs150 can be more than or less than Vmppt, so that Vmppt+Vs=VDClink).Work as Vmppt152 are less than VDClinkWhen 154, lead to DC to DC converters 402 are crossed to process input voltage Vmppt152 only certain fraction, wherein the fraction for processing depends on Vmppt 152 and VDClinkVoltage difference between 154.More precisely, working as Vmppt≤VDClinkWhen, the work(of the treatment of DC to DC converters 402 The fraction of rate can be calculated as follows:

(formula 2)

Work as Vmppt152 are substantially equal to VDClinkWhen, all input powers are by DC to DC converters 402 without being processed And/or conversion (that is, all Vmppt152 are routed to deferent segment 92, and transistor 403 goes to " disconnecting (OFF) " state). Work as Vmppt152 when exceeding predefined voltage level, and transistor 403 is configured to limit V by being maintained at " conducting " statemppt 152.When " conducting " state is maintained at, transistor 403 prevents the (V of PV array voltages 152mppt) exceed predefined level, this May occur for example during starting and/or under extreme cold and bright state.

In the circuit shown in Fig. 2 and Fig. 7-11, can be by transistor 102,104,284,312,364,366,368,370 Retain " conducting " to limit the array voltage (V in the case of non-recurrent array voltage high with 403mppt) 152, this may occur In for example very cold and bright situation.When being maintained in " conducting " position, transistor 102,104,284,312,364, 366th, 368,370 and/or 403 is circuit protecting element, and its substantially " short circuit (crowbar) " DC link 84 is limiting PV arrays Voltage (Vmppt)152.By limiting Vmppt152, the power output of PV units 22 is reduced, so as to prevent the damage to PV units 22 It is bad.Furthermore, when in " conducting " position, transistor 102,104,284,312,364,366,368,370 and/or 403 increases Plus flow to the electric current (I of just level segment 90primary) 142, and therefore, reduction flows to DC load 86 (as shown in Figure 2) and/or DC chains Electric current (the I on road 84 (as shown in Fig. 2 and Fig. 7-11)load)146.Additionally, the PPC in circuit 82,280,300,360 and/or 374 Commutation diode (for example, diode 114 and 116 (as shown in Figure 2) and/or diode 291 (as shown in Figure 7)) in converter or Play dual parts of commutation diode and isolating diode in the case of string failure.These diodes will prevent failure by DC chains The short circuit of road 84 and potentially result in the cascading failure of other converters in system.Can consciously by each PV go here and there its Its two ends can be remained floating by middle one end ground connection.

Figure 12 is the demonstration methodses for controlling the operation of electricity generation system (for example, PV electricity generation systems 10 (as shown in Figure 1)) 412 flow chart 410.As mentioned previously, electricity generation system 10 includes at least one generator unit, for example, PV units 22 are (as schemed Shown in 1), and at least one portion power converter, such as DC to DC converters 70 (as shown in Figure 1).Furthermore, DC to DC turns Parallel operation 70 includes controller, for example, controller 106 (as shown in Figure 2), it is configured to control at least one semiconductor switch, example Such as the operation of transistor 102 and transistor 104.In the example embodiment, method 412 includes configuration 414 Partial Powers conversion Device 70 is flowed through the level of the electric current of transistor 102, and 416 Partial Power converters 70 of configuration with determination and flows through crystalline substance to maximize The level of the electric current of body pipe 102 and the thus power output of maximization PV units 22.

In the example embodiment, method 412 also includes working as during for example starting and/or extreme cold and bright state When the voltage output of lower PV units 22 exceedes predefined level, 418 controllers 106 of configuration are maintained at first with by transistor 102 Position (for example, " conducting " position).Controller 106 is configured to 420 operation transistors 102 to limit the event in electricity generation system 10 Barrier electric current.Method 412 also includes 422 Partial Power converters 70 of configuration with to being transported to load (for example, being transported to DC loads 86 (as shown in Figure 2)) the part of general power conveyed.And, electricity generation system 10 also includes DC to AC inverters, such as DC To AC inverters 14 (as shown in Figure 1), and method 412 configuration 424DC to AC inverters 14 can also be included with control section The voltage level of the power output of power converter 70.

Method described herein, system and equipment provide the usefulness better than total power DC to DC converters, including:More System effectiveness high and the high-energy yield being achieved in;Lower rated power converter;Smaller size;Lower weight Amount;Lower cost;Energy yield higher;And MPPT maximum power point tracking is realized without sensor.Side described herein Method, system and equipment enable to the distributed structure/architecture to have cost efficiency for the big commercial and other system of utility grade.Remove Outside commercial and utility grade other system, method described herein, system and equipment can be applicable to module level compared with Mini system, such as house or small commercialization.Furthermore, size, cost and weight that method described herein, system and equipment to be realized The reduction of amount so that DC to DC converters can be easily integrated with PV modules (i.e., it is possible to DC to DC converters are located at into PV hairs At terminal box in electric system).

Described herein is for changing and controlling PV modules, string or one group of demonstration side of a part for the power of string conveying Method, system and equipment, compared with conversion PV modules, string or one group of whole power of string conveying, these demonstration methodses, system and set The standby cost facilitated the lifting of conversion gross efficiency and reduce converter.More precisely, method described herein, system and equipment Enable that the converter of lower-wattage is closer to PV modules in terms of electricity, for example, be located in string combiner box, or directly Be connected to string output in succession because the converter of lower-wattage has lower cost, and be rated in power level with PV modules, String or the power of one group of string conveying are similar.

Method described herein, system and equipment help to realize efficient and economic generating.Describe in detail herein and/ Or the example embodiment of graphic technique, system and equipment.The method, system and equipment are not limited to particular implementation described herein Example, conversely, can be independently of one another and dividually using each system described herein and/or component and each side of equipment The step of method.Each component and each method and step can be used with combination with one another.

When element/assembly of method and apparatus for being described herein and/or illustrating etc. is introduced, article " ", " being somebody's turn to do " and " institute State " it is intended to mean that in the presence of one or more element/assemblies etc..Term " including ", "comprising" and " having " should covering property, and And express possibility in the presence of additional element/assembly outside listed element/assembly etc. etc..

This written description uses examples to disclose the present invention including optimal mode, and also enables those skilled in the art The practice present invention, including make and use any device or system and the method for performing any combination.The present invention can obtain patent Scope be defined by the claims, and may include the other examples that those skilled in the art expect.If such other examples tool Have from claim literal language without different structural elements, or if they are included with claim literal language without essence Different equivalent structural elements, then they be defined as within the scope of claim.

List of parts

10 electricity generation systems

More than 12 PV unit

14 DC to AC inverters

16 power network

18 inputs

22 the oneth PV units

24 the 2nd PV units

26 the 3rd PV units

28 the 4th PV units

30 the 5th PV units

32 the 6th PV units

40 first string combiners

The string of 42 first arrays

46 second string combiners

The string of 48 second arrays

50 array combiners

68 at least one DC to DC converters

70 the oneth DC to DC converters

72 the 2nd DC to DC converters

74 the 3rd DC to DC converters

76 the 4th DC to DC converters

78 the 5th DC to DC converters

80 the 6th DC to DC converters

82 circuit diagrams

84 DC links

86 DC are loaded

88 transformers

90 first level segments

92 secondary sections

96 first armature windings

98 second armature windings

102 transistors

104 transistors

106 controllers

108 first secondary windings

110 second subprime windings

114 first diodes

116 second diodes

120 outputs

130 centre caps

140 centre caps

142 primary currents

144 PV electric currents

146 DC load currents

150 DC transducer voltages

152 PV array voltages

154 DC link voltages

180 curve maps

182 gross efficiencys

184 gains

190 curve maps

192 fractional ratings

200 curve maps

210 per unit voltages

220 first curve maps

222 second curve maps

224 the 3rd curve maps

256 maximum voltages

280 circuit diagrams

282 first alternative DC to DC converters

284 transistors

286 transformers

288 first capacitors

290 second capacitors

291 commutation diodes

292 first cases

294 second sides

300 circuit diagrams

310 second alternative DC to DC converters

312 transistors

314 inductors

320 primary currents

322 controllers

360 circuit diagrams

362 the 3rd alternative DC to DC converters

364 the first transistors

366 transistor secondses

368 third transistor

370 the 4th transistors

372 current sensing devices

374 circuit diagrams

376 the 4th alternative DC to DC converters

378 the first transistors

380 transistor secondses

382 third transistor

384 the 4th transistors

386 DC electric currents

388 full-bridge rectifiers

390 first diodes

392 second diodes

394 the 3rd diodes

396 the 4th diodes

400 circuit diagrams

402 the 5th alternative DC to DC converters

404 inductors

405 input capacitors

406 output capacitors

408 diodes

410 flow charts

412 method for controlling the operation of electricity generation system

The level of electric current of the 414 configuration section power converters to determine to flow through transistor

416 configuration section power converters are to maximize the level of the electric current for flowing through transistor, so as to maximize PV moulds The power output of block

Transistor is maintained at first by 418 Configuration Control Units with when the voltage output of PV modules exceedes predefined level Position

420 Configuration Control Units limit the fault current in electricity generation system to operate transistor

422 configuration section power converters are conveyed with a part for the general power to being transported to load

424 configuration DC to AC inverters are with the voltage level of the power output of control section power converter

Claims (6)

1. a kind of electricity generation system (10), the system includes:
Multiple generator units, each is configured to export DC power, wherein the generator unit includes photovoltaic cells;
Multiple DC to DC Partial Powers converters, be each coupled to corresponding generator unit and each include input section and Deferent segment, wherein the deferent segment and corresponding generator unit series coupled, wherein each DC to DC Partial Powers converter are configured Into the DC power outputs for processing corresponding generator unit Part I and by the DC power outputs of corresponding generator unit The second untreated part provide to the deferent segment,
At least one combiner, the DC work(for combining the deferent segment from DC to the DC Partial Powers converter Rate is exported and provides to main system DC links combined DC power;And
At least one DC to AC inverters, it is coupled to the main system DC links and is configured to control in the main system DC The voltage level of the power output on link, from DC to the DC Partial Powers converter.
2. the system as claimed in claim 1 (10), wherein, each for DC to the DC Partial Powers converter, institute State input section and the deferent segment direct-coupling.
3. the system as claimed in claim 1 (10), wherein, each of DC to the DC Partial Powers converter is included extremely A few transformer, wherein the input section includes the armature winding of at least one transformer, and the deferent segment bag The secondary windings of at least one transformer is included, and wherein described armature winding receives the DC work(of corresponding generator unit The Part I of rate output, and induct across the voltage of the secondary windings, its DC work(with corresponding generator unit Described second untreated part of rate output combines and is provided as the power from DC to the DC Partial Powers converter Output.
4. the system as claimed in claim 1 (10), wherein, DC to the DC Partial Powers converter each be configured to from Corresponding generator unit extracts peak power.
5. system (10) as claimed in claim 4, wherein, each of DC to the DC Partial Powers converter is configured to most Electric current of bigization from DC to the DC Partial Powers converter exports to maximize the power output of corresponding generator unit.
6. a kind of DC to DC Partial Powers converter, including:
Input section, its Part I for being configured to the DC power outputs for receiving photovoltaic generation unit, the input section includes input Capacitor, switch and inductor;And
Deferent segment, it is configured to the part and second of the first treatment of the DC power outputs comprising the generator unit not The DC power outputs of the part for the treatment of are to DC links, and the deferent segment includes output capacitor and output diode,
Wherein, the output capacitor and the output diode are respectively connected to the positive node of DC links, the input capacitor The negative nodal point of DC links is respectively coupled to described switch, and the inductor is connected the input capacitor and the output At end between capacitor and the other end between the output diode and the switch.
CN201210142028.XA 2011-06-29 2012-04-28 DC to DC power converters and the method for controlling the power converter CN102857107B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US13/171,683 US8330299B2 (en) 2011-06-29 2011-06-29 DC to DC power converters and methods of controlling the same
US13/171683 2011-06-29

Publications (2)

Publication Number Publication Date
CN102857107A CN102857107A (en) 2013-01-02
CN102857107B true CN102857107B (en) 2017-05-31

Family

ID=45697078

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201210142028.XA CN102857107B (en) 2011-06-29 2012-04-28 DC to DC power converters and the method for controlling the power converter

Country Status (4)

Country Link
US (1) US8330299B2 (en)
EP (1) EP2541747A3 (en)
JP (1) JP2013013306A (en)
CN (1) CN102857107B (en)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5306306B2 (en) * 2010-10-19 2013-10-02 オムロンオートモーティブエレクトロニクス株式会社 Switching power supply
CN102655377B (en) * 2012-04-25 2015-05-27 华为技术有限公司 Voltage regulating circuit
US20140001856A1 (en) * 2012-06-29 2014-01-02 General Electric Company Multilevel power converter
US9389288B2 (en) 2012-09-14 2016-07-12 General Electric Company System and method for maintaining soft switching condition in a gradient coil driver circuit
CN102931679A (en) * 2012-10-12 2013-02-13 吴加林 Multistage boosting high-power photovoltaic grid-connected power station
US8648498B1 (en) * 2012-11-19 2014-02-11 Renewable Power Conversion, Inc Photovoltaic power system with distributed photovoltaic string to polyphase AC power converters
US8937824B2 (en) * 2013-01-28 2015-01-20 Eaton Corporation Photovoltaic system and method of controlling same
TWI491858B (en) * 2013-03-15 2015-07-11 Richtek Technology Corp Temperature determination circuit and method thereof
US10023072B2 (en) * 2013-08-26 2018-07-17 Johnson Controls Technology Company DC-DC converter for vehicle
US20150131328A1 (en) * 2013-11-08 2015-05-14 General Eectric Company System and method for power conversion
US9680376B2 (en) * 2014-02-28 2017-06-13 Cree, Inc. Power conversion electronics having conversion and inverter circuitry
WO2015172254A1 (en) * 2014-05-16 2015-11-19 Solar Ship Inc. Four-quadrant partial power processing switched-mode converter for photovoltaic applications
US9948137B2 (en) * 2014-07-22 2018-04-17 Rick Smith Grid tie charge controller
US9899869B1 (en) * 2014-09-03 2018-02-20 Bentek Corporation Photo voltaic (PV) array-shedding and storage system
US9809119B2 (en) 2015-01-13 2017-11-07 General Electric Company Bi-directional DC-DC power converter for a vehicle system
US9525355B2 (en) 2015-03-26 2016-12-20 General Electric Company Direct current electric power systems and method of operating the same
CN105099363B (en) * 2015-08-07 2017-07-14 浙江昱能科技有限公司 A kind of power inverter for photovoltaic system
US10256732B2 (en) 2015-10-16 2019-04-09 General Electric Company Power conversion system and method of operating the same
US10147825B2 (en) 2015-11-25 2018-12-04 Qatar Foundation Hybrid partial power processing system
US9960687B2 (en) * 2016-06-06 2018-05-01 General Electric Company System and method for a DC/DC converter
CL2016002155A1 (en) * 2016-08-25 2016-11-11 Univ Tecnica Federico Santa Maria A converter partial power (ppc) in a power system
DE102016217040A1 (en) 2016-09-07 2018-03-08 Brusa Elektronik Ag High performance charge pump with inductive elements
CN107769580B (en) * 2017-11-16 2019-12-31 陕西航空电气有限责任公司 Improved push-pull converter based on sliding mode control

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19919766A1 (en) * 1999-04-29 2000-11-02 Sma Regelsysteme Gmbh Inverter for a photovoltaic unit for use in a solar generator to maximize the power/performance output, the so-called maximum power point tracking

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001255949A (en) * 2000-03-13 2001-09-21 Toshiba Corp Photovoltaic power generating inverter device
JP3931734B2 (en) * 2002-06-05 2007-06-20 トヨタ自動車株式会社 Electric load drive
JP2005312158A (en) * 2004-04-20 2005-11-04 Canon Inc Power converter and its control method, and solarlight power generator
TWI270998B (en) * 2005-09-27 2007-01-11 Liou Ching Shiung A voltage supplying apparatus using a fuel cell
KR100770791B1 (en) * 2006-03-15 2007-10-26 주식회사 맥스컴 Apparatus and method for power conditioning system of solar photovoltaic
KR100757320B1 (en) * 2006-05-09 2007-09-11 창원대학교 산학협력단 The control apparatus and method of senseless mppt control for photovoltaic power generation system
JP2008086146A (en) * 2006-09-28 2008-04-10 Honda Motor Co Ltd Dc-dc converter
US7929325B2 (en) 2008-05-27 2011-04-19 General Electric Company High efficiency, multi-source photovoltaic inverter
GB2476508B (en) * 2009-12-23 2013-08-21 Control Tech Ltd Voltage compensation for photovoltaic generator systems

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19919766A1 (en) * 1999-04-29 2000-11-02 Sma Regelsysteme Gmbh Inverter for a photovoltaic unit for use in a solar generator to maximize the power/performance output, the so-called maximum power point tracking

Also Published As

Publication number Publication date
CN102857107A (en) 2013-01-02
US8330299B2 (en) 2012-12-11
EP2541747A2 (en) 2013-01-02
JP2013013306A (en) 2013-01-17
EP2541747A3 (en) 2013-09-04
US20120051095A1 (en) 2012-03-01

Similar Documents

Publication Publication Date Title
US9608448B2 (en) Distributed energy conversion systems
US9917534B2 (en) Power conversion device with a plurality of series circuits
US10141745B2 (en) Photovoltaic power conditioning units
US10608553B2 (en) Maximizing power in a photovoltaic distributed power system
US9886051B2 (en) DC microgrid for interconnecting distributed electricity generation, loads, and storage
Huang Medium-voltage solid-state transformer: Technology for a smarter and resilient grid
US9502895B1 (en) Photovoltaic DC/DC micro-converter
Hasan et al. Grid-connected isolated PV microinverters: A review
Spagnuolo et al. Renewable energy operation and conversion schemes: A summary of discussions during the seminar on renewable energy systems
Kjær Design and control of an inverter for photovoltaic applications
US8526205B2 (en) Photovoltaic power conditioning units
CA2867592C (en) Systems and methods for solar photovoltaic energy collection and conversion
US20160329811A1 (en) Interleaved multi-channel, multi-level, multi-quadrant dc-dc converters
Araújo et al. Highly efficient single-phase transformerless inverters for grid-connected photovoltaic systems
JP6299028B2 (en) Circuit and method for limiting the open circuit voltage of a photovoltaic string
KR101507560B1 (en) Configurable hybrid converter circuit
US8358033B2 (en) Systems, methods, and apparatus for converting DC power to AC power
US9998033B2 (en) Stacked voltage source inverter with separate DC sources
JP6025238B2 (en) Method and system for operating a two-stage power converter
US8648497B2 (en) Photovoltaic power plant with distributed DC-to-DC power converters
Kannan et al. Photovoltaic based distribution static compensator for power quality improvement
US8212408B2 (en) Collection of electric power from renewable energy sources via high voltage, direct current systems with conversion and supply to an alternating current transmission network
Xue et al. Topologies of single-phase inverters for small distributed power generators: an overview
US8058747B2 (en) Systems to connect multiple direct current energy sources to an alternating current system
EP2294669B1 (en) Direct current power combiner

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant